<!DOCTYPE html>
<html lang="zh-CN">
<head>
    <meta charset="UTF-8" />
    <meta name=""
    <title>Web UI Lab1</title>
    <style>
        body {
            font-family: Arial, sans-serif;
            margin-top: 50px;
            background-color: #f0f8ff;
        }
        h1 {
            color: #39b151;
        }
    </style>
</head>
<body>
    <h1>Hello World!</h1>
    <p>欢迎来到我的网页界面设计实验。</p>
    <p>123</p>
</body>
</html>